first draft
Merge remote-tracking branch 'upstream/develop' into ebuild_enhanced

Conflicts:
	salt/states/portage_config.py
some fixes
merge fix
other merge fix
added check_extra_requirements function
check_extra_requirements documentation
some fixes
fixes
doc fix
overlay->repository
Merge in target data to preliminary cmd execution
virt.init: support custom seed cmd
Merge remote-tracking branch 'origin/develop' into virt
Return a dict with args to the execution system
Add some clean default injection
Add initial cli composer for salt-ssh
Merge pull request #5851 from mgwilliams/virt

virt.init: support custom seed cmd
Fix version parsing for 'v0.16' style tags
Bump to 0.16.0 in version.py